<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>文本大小</title>
</head>
<body>
    <h1>我是h1标签</h1>
    <p>你好h1</p>
    <h2>我是h2标签</h2>
    <p>你好h2</p>
    <h3>我是h3标签</h3>
    <p>你好h3</p>
    <h4>我是h4标签</h4>
    <p>你好h4</p>
    <h5>我是h5标签</h5>
    <p>你好h5</p>
    <h6>我是h6标签</h6>
    <p>你好h6</p>
</body>
</html>